Should look like this:



Use a XR2i/XR3i EFI fuel rail, mod the MFI injector sandwich plate for EFI injectors (just needs wider holes), take off some material from the inlet... done. Won't need EFI head then.







ERST throttle body bolts straight onto RSi inlet. You also can use a XR3i MFI inlet, but then you'll need an Escort MK3 one or at least the adaptor plate of a MK3 to fit the rectangular throttle body to the triangular shape of the XR3i inlet.

A friend of mine used WM in his ERST S1 with RSi inlet and a modded ERST throttle body.